Governed p?.



$3,101' i Patented @151211909 Norman Mcariy.

UNITED STATES PATNT orFica.

NORMAN M-CCARTY, or INnIANl- A-POLIsY INDIANA, 'AssIeNon To ATLAS ENeINnwoaKs- INDIANAPOLIS, INDIANLA CORPORATION or II\u)IANA.;v

l GOVERXED' F Application med Februaxy4, 1909. sean No. 476,045.

To all whom may concern;

v.` Bel it known that I. NORMAN VMCCAR'IY,

-afcitiz'en O the United States, .residing at ndianapollgin the countv'of `Marion and,

oflndiana, haveinvented certain new usetul Improvements 1n Governed ;aiidated within a' closed'overflow chamber' :the volume .of which -varies with the` stroke the piston. lhe accompanying drawing is a---vertical afxial section of an embodimentof my invention.

In the drawing, indicates a 'main pump body hav-ing a pump chalnher'll linto which leads a supply passage 12, a suitable inwardly-opening check-valve '13 being arranged between the said supply passage and the'supply pipele. Leading yfrom chamber l1 is a discharge passage 15 communicating with a discharge pipe 16, a suitable ,Out-

. wardly-Opening' check-valve 17 being placed A tended to deliver to the atom-12er of an intherebetween. The discharge pipe 16 is internal combustion engine within -which is maintained a high pressure, as is -usual in such'types of engines, althoughthe apparatus can of coursebe used in other Ways. Projected into chamber 11, through a suit able'packing gland 18, is a pump piston 19 adapted to be reciprocated by any suitable means, such for instance as lever 21, arm 22 andeccentric23, and preferably 1n uniform strokes.

Leading from chamber 11 is an inwardly .opening excess valve 25 which isnormally yieldingly held closed by means of a spring 26, a head 27 being-secured to the 'upper end of the stem of valve 25. Leading yfrom cham-l ber`11 at a point beyond valve 25 is a passage 28 which communicates through pipe 29, with a chamber 31 Within which istted the upper end 32 of piston 19. y

In Order to operate valve 25 I provide' a lever which is connected at one end to lever v21 and'at the opposite end is 'provided with a roller 3G adapted to be brought into en-' gegen-lent with head 27 to act against spring Specification of Letters Patent.

ps ,ojivhich the following is a specifi- 'pin 38 to Its extreme 26. Lever 35 is provide slot into which is progected the, pin 38 and 'said pivot pin is 'also extended intoa slot 39 formed in-thefst-ationary bracket 41.

Pin 38 is carried by an'aringl foriningpart of thestrap l5 surrounding ,eccentric 4111, and said eccentric 41 is carriedby y jafi ;leshaft l5 having an arm 16tolwhich'is connected a speed controlled govemiorgshoW-nfdiagrams matically at. 2T'. l f f supposing the chambellfanpa'ssages 2S and29 and chamber,r 31-to -.,be.- i1led'ivith oil and the parts in: thepositions.shownin thedra'wing, the operation; is-fas followsr-z-'f The rst up-stroke of piston 19will dra-w' in anam-ount of Oil intorchainbery 11-equal to the .displacementof thepistonbut chain#A ber 31 and its connecting .@passages, L being filled' lwit-heil, the oilgtogsnpplythe enlai-ged chamber 11 Ivill-,bezforced from chamber.31 through valve- 25-iintoY chamber 'll. On the down'stroke of piston 1 9 this amount of 'oil will be discharged .thiiouglr pipe lli and a partial vacuum Willlbelcreated linchaniber 31, because, the pin 38 being in the-position shown, roller 36' will only barelyjtouch head 27 and valve 25 will not open. T he next upstroke of piston 19;,ivill again create. a

vacuum wlthin chamber-i115avhich' willbe filled this time from thesupply pipo ll and f 'on the vnext down strolrefaofytlw.pislonltho previous amount of intlowtwillbe.discharged through pipe 16. This is the condition Ot' Operation when the engine is operating under full load and therefore Arequiring the full supply of fuel deliverable by the pump. As .the load on the engine decreases, 'shaft 45 will be rocked so as to. shift pin 38 downward in slot l39 so that, before the piston 19 has finished its 11p-stroke, roller 36 will en-v gage-head. 27 and open valve 25 so that, at

the beginning of the next down stroke ot' the piston 19, the initial outflow from chamber 11,will be through valve 25 into pipe 29 and chamber 31 instead of out through the discharge pipe 16, and this reliminary dis- .charge will continue until tie roller 36 has been withdrawn from head 27 and valve 25 has closed, whereupon the further downward movement .o'pistonv 19 operates to produce a discharge through ipe-16. By shifting a? the lower end of slot 39, valve 25 will be kept Open during the entire time of. the downward or displacing ystroke of' piston 19 so that there will be no diSCllarge through` pipe 16. Whenever th' Giusi/ment 0f Pill 38 is. such as to cause Lthe may be very sensitive.

ing plunger carried thereby, a cylinder in which said compensating plunger is fitted, a connectlon between the pump chamber and 1 said cylinder, a valve mounted in said connection, means-for opening and closing said `valve in synchronism with the movement olf the displacing plunger. v

2. The combination, in a fuel` pump having a main chamber,a valved inlet pide, and a valved outlet pipe, of adisp'lacingp -unger projectabyle into said chamber, a compensat-` ing plunger carried thereby, a cylinder in which said compensating plunger is fitted, a connection between the pump chamber and said cylinder, a valve mounted in said connection, and means for opening and closing said valve in synchronism ywith the movement of the displacing plunger, and means for varying the open period of said valve.

3. The combination, in'y a Jfuel pump having amain chamber, a valved inlet pipe, and

-ing Aplunglger ,carried thereby, a yeylinde a 'lived outlet pipe, of a displacing plu if' pro]ectable inte said chamber, a comp in (which saidcompensatng plunger is iited, a connection between the ump chamber and said cylinder, a valve mounted in said ccnnection, .and means for opening land @loting said valve in synchronism with the mcvement of the displacing plunger. and su' I controlled means for varying' the open riod of said valve;`

llafhe combination, in a fuel pump having a main chamber, a valved inlet pipe, "and a valved outlet pipe', oi? a displacing plunger mounted in said chamber, a compensating chamber, means associated with said ccmpensating chamber and with the displacing plunger for increasing and decreasing the re-ceptivity or' said compensating chamber, a connection between the pump chamber and compensating chamber, and means for variably controlling thesaid connection.

5. The combination, in a i'nel pump liaring amain chamber, a v'alved inlet pipe, ana a valved outlet pipe, of adisplacing plunger mounted inssaidr chamber, a compensating chamber, means associated with said conpensating chamber .and Wit the displacing plunger for increasing an4 decreasing the receptivity cfsaid compensating chamber, aA connection between the pump chamber` and compensating chamber, a valve in said connection, and means connected with the placing plunger for controlling said'valve lirwitness whereof,y I have hereunto my 'hand and seal atlndianapcliar Indiana, this twenty-ninth daycof January3\.. one thousand nine hundred and nine.

NGRMAN MCCARTY. [n s Witnesses:

` ARTHUR M. Hoon,

THOMAS XV. Moll/hr.mas,` 

